Summary translation

A long term field monitoring concerning the development of organic farming was performed at the bio-farm "Rutzendorf" of the BVW GmbH in the Marchfeld region. It is an interdisciplinary project, which started in 2003, where the most important system components in an agro eco-system were analysed. Objectives of the project: (a) examination of changes concerning soil and plant parameters with the conversion to organic farming; (b) investigation of the effects of three organic fertilization systems, (c) analysis of the effects of biotopes and the cultivation on the biodiversity of the area. In the first year the monitoring plots were established and the present state of the examined parameters determined. The following investigations showed still no influence of the organic cultivation and the manuring on the soil parameters except of the aggregate stability, but first differences in the yields in dependence on the fertilization. The conversion to organic farming and new biotope structures had positive influence on the biodiversity, both flora and fauna. Plant yields and availability of soil water in the field were higher closer to a hedge.